It's not so damn hard to reach withdrawal limit from faucet at any gambling site, I find it more harder to stop playing after it has been reached. It is free money after all.

OP all martingales are the same, either it is lower payout and higher bet increase on lose or it is higher payout with lower bet increase on lose.
I like to try luck with reversed martingale on any kind of payouts but to be honest I was never lucky enough to win enough times in a row to make profit or I was too greedy to collect some and continue to bet